gnmijk - github pages · 2019. 11. 8. · 3 ur ilw 5 hs r uwlq j ' % 2 q olq h 6 k r s '...

Programming Computers

Oliver Sturm • @olivers • [email protected]

Computers Are EverywhereObvious: PC, Mac

Mobile: laptops, tablets, phones

Small: watches, wearables

Integrated/embedded: controllers in cars, radios, home electronics, USB sticks

Sometimes the term "computer" is interpreted to include components other than theprocessor: memory, I/O chips, storage

Programming Computers 2 / 18

Computers Are EverywhereObvious: PC, Mac

Mobile: laptops, tablets, phones

Small: watches, wearables

Integrated/embedded: controllers in cars, radios, home electronics, USB sticks

Sometimes the term "computer" is interpreted to include components other than theprocessor: memory, I/O chips, storage

All processors require program code!


Program DeliveryDesktop: installers

Mobile: app stores

Web: download in browser

Controllers: factory preload, and/or developer upload through interfaces


Programming Languages - AssemblerAssembler "keywords" are translated (almost) directly into processor opcodes

iNumVec EQU [esp + 16]pResult EQU [esp + 20]

mov ecx,iNumVecmov eax,pMatrixlea edx,[ecx*8]neg ecx


Programming Language BabylonWikipedia lists 694 "notable programming languages"

694!

Many languages are "special purpose"

Many general-purpose languages have evolved and replaced one another

StackOver�ow survey 2019 still shows 11 languages used by at least 20% of thesurvey audience


Programmable Controllers: Arduinohttps://arduino.cc

Arduino IDE (Integrated Development Environment) free to download

Lots of tutorials

Basic principle of programming: IPOInput / process / output


https://arduino.cc/

Programmable Controllers: Arduino


Arduino Sample - TinkerCad


A Look At The Code (Main Loop IPO, cut to size)void loop() { int readings[buttonsHandled];

for (int i = 0; i < buttonsHandled; i��) { �� Input: Read all the button states readings[i] = digitalRead(buttonIndexBase + i);

�� Process: find out whether output should be switched if ((millis() - debounceStartTime[i]) > debounceDelay) { �� Output: set the new state digitalWrite(outputIndexBase + i, outputStates[i]); } }}


Other Small Programming PlatformsMicrobit (https://microbit.org)

Great for learning

Visual Programming

JavaScript

Raspberry PiComplete computer, but cheap and small

Linux, Windows (IoT Core), and others

Automation, network systems, entertainment

PocketChipAll-in-one mini computer


https://microbit.org/

Writing "real" computer applicationsUser interfaces required

View description languages

Native vs cross-platform

Most popular application platform now: HTML/CSS/JS

Learn in sandbox environments, e.g. https://codepen.io


https://codepen.io/

Sample HTML<p> <button onclick="button_clicked()">Do something��button>��p>

<p> <input type="text" id="name" placeholder="Please enter your name" ��

<button onclick="sayhi()"> Click here once you've entered your name ��button>��p>

<p id="output">��p>


Sample CSSbutton:hover { background�color: red;}


Sample JavaScriptfunction button_clicked() { alert('Thanks for clicking the button');}

function sayhi() { const nameField = document.getElementById('name'); const outputField = document.getElementById('output'); outputField.innerHTML = 'You said your name is <b>' + nameField.value + '��b>';}


Frameworks And LibrariesProgrammers are lazy

Code can be distributed and reused

ExamplesUI libraries

Network functionality

Working with persistent data

Science and math functionality

Hardware interaction


Software Architecture

Client

Message Queue /Event Bus

ProfitReporting

DB

OnlineShopDataDB

CustomerData

Db

Web Server

CommandProcessorEvent Store

Loaddata

Access Web App

Send commands

Load data

Load data


Questions?

Thank YouPlease feel free to contact me about the content anytime.

Oliver Sturm • @olivers • [email protected]

gnmijk - github pages · 2019. 11. 8. · 3 ur ilw 5 hs r uwlq j ' % 2 q olq h 6 k r s '...

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